contestada

A Student (you need to declare a class for it) is a class defining a Student with information (such as name, id , average, letter grade and a list of 6 test scores) and associated operations (Constructors, mutators, accessors, auxiliary operation anything else you like).

Respuesta :

teobguan2019

Answer:

  1. public class Student {
  3.    private String name;
  4.    private String id;
  5.    private double averageScore;
  6.    private double [] testScores = new double[6];
  7.    private String [] letterGrade = new String[6];
  9.    public Student(String name, String id, double [] testScores)
  10.    {
  11.        this.name = name;
  12.        this.id = id;
  14.        setTestScores(testScores);
  15.        setLetterGrade();
  16.        setAverageScore();
  17.    }
  19.    public String getName()
  20.    {
  21.        return this.name;
  22.    }
  24.    public String getId()
  25.    {
  26.        return this.id;
  27.    }
  29.    public void setTestScores(double [] testScores)
  30.    {
  31.        for(int i=0; i < testScores.length; i++)
  32.        {
  33.            if(testScores[i] >=0 && testScores[i] <=100) {
  34.                this.testScores[i] = testScores[i];
  35.            }
  36.            else{
  37.                throw new IllegalArgumentException("The score must be within 0-100");
  38.            }
  39.        }
  40.    }
  42.    public double [] getTestScores()
  43.    {
  44.        return this.testScores;
  45.    }
  47.    public void setLetterGrade()
  48.    {
  49.        for(int i = 0; i < this.letterGrade.length; i++)
  50.        {
  51.            this.letterGrade[i] = convert_to_grade(this.testScores[i]);
  52.        }
  53.    }
  55.    public String [] getLetterGrade()
  56.    {
  57.        return this.letterGrade;
  58.    }
  60.    public void setAverageScore()
  61.    {
  62.        double total = 0;
  64.        for(int i = 0; i < this.testScores.length; i++)
  65.        {
  66.            total += this.testScores[i];
  67.        }
  69.        this.averageScore = total / 6;
  70.    }
  71.    
  72.   public double getAverageScore()
  73.    {
  74.        return this.averageScore;
  75.     }
  77.    private String convert_to_grade(double score)
  78.    {
  79.        if(score >= 80) {
  80.            return "A";
  81.        }
  82.        else if(score >=70) {
  83.            return "B";
  84.        }
  85.        else if(score >= 60) {
  86.            return "C";
  87.        }
  88.        else if(score >=50) {
  89.            return "D";
  90.        }
  91.        else {
  92.            return "F";
  93.        }
  94.    }
  96.    public void displayStudentInfo()
  97.    {
  98.        System.out.println("Name         : " + this.name);
  99.        System.out.println("ID           : " + this.id);
  100.        System.out.println("Average score: " + this.averageScore);
  101.    }
  102. }

Explanation:

Line 1:

  • Create a class and name it as Student

Line 3 - 4:

  • Define class properties to hold the information related to student such as name, id, test scores, letter grade and average score.

Line 9 - 17:

  • Create Constructor.
  • This Constructor will accept three arguments, name, id and testScores.
  • The Constructor is used to initialize all the class properties

Line 19 - 22; Line 24 - 27; Line 42 - 45; Line 55 - 58; Line 72-75:

Create Accessors for

  • name property (Line 19 - 22)
  • id property (Line 24 - 27)
  • testScores property (Line 42 - 45)
  • letterGrade property (Line 55-58)
  • averageScore property (Line 72-75)

Line 29 - 40; Line 47 - 53; Line 60 - 70:

Create Mutators for

  • testScores property (Line 29 - 40)
  • letterGrade property (Line 47 - 53)
  • averageScore property (Line 60 -67)

Line 77 - 94 and Line 96 - 101:

Create auxiliary methods for

  • converting score to a corresponding grade (Line 77 - 94)
  • displaying student summary (Line 96 - 101)

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